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07_InstSolManual_PDF_Part25 - 2 F 5 kx 5 1 250 N m 21 0.283...

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Solve: (a) (b) (c) so the graph of versus h is a straight line with slope 7.109. Set Up: Hooke’s law states and Solve: (a) Yes, since U is a linear function of (b) The graph shows when thus (c) (d) (e) the graph is a parabola as shown below. Figure 7.109 7.110. Set Up: and Figure 7.110 Solve: (a) Since when (b) (c) (d) so the graph is a parabola as sketched. K 5 1 2 m v 2 , v 5 Å 2 K m 5 Å 2 1 5.0 J 2 5.0 kg 5 1.4 m / s K 5 1 2 m v 2 5 1 2 1 5.0 kg 21 3.0 m / s 2 2 5 22.5 J m 5 2 1 10.0 J 2 4.0 m 2 / s 2 5 5.0 kg v 2 5 4.0 m 2 / s 2 , K 5 10.0 J 50 40 30 20 10 5 4 3 2 1 O v 1 m/s 2 K 1 J 2 v 5 " 2 K / m K 5 1 2 m v 2 2 0.20 2 0.10 0.10 0.20 O 1 2 3 4 5 6 7 8 U el 1 J 2 x 1 m 2 U el 5 1 2 kx 2
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Unformatted text preview: 2 ; F 5 kx 5 1 250 N / m 21 0.283 m 2 5 70.8 N x 5 Å 2 U el k 5 Å 2 1 10.0 J 2 250 N / m 5 0.283 m 5 28.3 cm k 5 2 U el x 2 5 2 1 5.0 J 2 4.0 3 10 2 2 m 2 5 250 N / m. x 2 5 4.0 3 10 2 2 m 2 ; U el 5 5.0 J x 2 . F 5 kx . U el 5 1 2 kx 2 w 5 50 N. U grav U grav 5 mgh h 5 v 2 2 g 5 1 4.0 m / s 2 2 2 1 9.80 m / s 2 2 5 0.82 m w 5 mg 5 K f / h 5 1 200 J 2 / 1 4.0 m 2 5 50 N Work and Energy 7-25...
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